Dustin,

I use a plastic filler nozzel off of a W-D 40 can, the little red plastic thing......use the small red hard plastic tube that comes with it and put a short piece of the tube that you have on the end of your filler valve that you are now using. Works great.
I am coming to Winamac Saturday, I have your engine and I'll show you the 15 cent filler valve.

Ron Ballard